O Fantasma da Ópera.

Brutal murders take set during the new production of "Marilia De Dirceu" at the Theatro Municipal in Rio De Janeiro. When Cristina Andreatti, daughter of famous Brazilian musician - Gastão Andreatti, takes the lead role, replacing La Carlota Alencastro, Cristina falls on the hands of a mysterious masked man who claims to be Alfredo do Vale, a musician who was killed in a brutal accident years ago.